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Kramar A, Luxbacher T, González-Benito J. Solution blow co-spinning of cellulose acetate with poly(ethylene oxide). Structure, morphology, and properties of nanofibers. Carbohydr Polym 2023; 320:121225. [PMID: 37659793 DOI: 10.1016/j.carbpol.2023.121225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 07/14/2023] [Accepted: 07/19/2023] [Indexed: 09/04/2023]
Abstract
Cellulose acetate (CA) nanofibers are prepared using solution blow co-spinning (SBS) with poly(ethylene oxide) (PEO). The pure CA membranes are obtained by washing water-soluble PEO from the fibrous CA-PEO blend. Nanofibrous membranes are characterized using optical and scanning electron microscopy (SEM), differential scanning calorimetry (DSC), infrared spectroscopy (ATR-FTIR), and surface zeta potential measurements. Thermal transitions from DSC and ATR-FTIR spectra analysis were used to confirm the removal of the PEO. Although the characteristic signals of PEO are not observed by FTIR, an additional thermal step transition in CA nanofibers indicates the embedding of a small amount of PEO (up to 6 wt%). SEM analysis shows that CA-PEO blends are constituted by fibers with mean diameters from 671 to 857 nm (depending on the SBS parameters), while after PEO removal, diameters range from 567 to 605 nm. We propose a new method for staining CA-PEO membranes with iodine solution in absolute ethanol that allows the differentiation of CA and PEO components with an optical microscope. The microscopy results suggest that PEO assists in the spinning by enveloping CA nanofibers, allowing uninterrupted processing. The successful deacetylation to cellulose using an aqueous KOH solution is confirmed with zeta potential measurements and ATR-FTIR.
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Affiliation(s)
- Ana Kramar
- Department of Materials Science and Engineering and Chemical Engineering, IQMAAB, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Spain.
| | | | - Javier González-Benito
- Department of Materials Science and Engineering and Chemical Engineering, IQMAAB, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Spain.
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2
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Kramar A, Luxbacher T, Moshfeghi Far N, González-Benito J. Active Cellulose Acetate/Chitosan Composite Films Prepared Using Solution Blow Spinning: Structure and Electrokinetic Properties. Polymers (Basel) 2023; 15:3276. [PMID: 37571170 PMCID: PMC10422433 DOI: 10.3390/polym15153276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/25/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023] Open
Abstract
Cellulose acetate (CA), a very promising derivative of cellulose, has come into the focus of research due to its highly desired good film-forming ability for food packaging applications. Frequently, this derivative is used in combination with other compounds (polymers, nanoparticles) in order to obtain active materials. Here, we report the preparation of thin films made of cellulose acetate loaded with chitosan (CS) using the solution blow spinning (SBS) method. Films are prepared by SBS processing of the polymers mixture solution, considering the following variables: (i) the concentration of cellulose acetate and chitosan in the solution and (ii) the solvent system consisting of acetic or formic acid. The prepared materials are characterized in terms of physical properties, roughness (optical profilometer), porosity, wettability (contact angle measurements), chemical structure (Fourier transform infrared spectrometry), and electrokinetic properties (zeta potential). SBS enables the preparation of CA/CS films with high water vapor permeability, high porosity, and also higher water contact angle compared with pure CA films. The electrokinetic properties of composites are influenced by the inclusion of chitosan, which causes a shift of the isoelectric point (IEP) towards higher pH values, but the magnitude of the shift is not in correlation with chitosan concentration. Adsorption kinetic studies using bovine serum albumin (BSA) as a model protein reveal that chitosan modified cellulose acetate films manifest low affinity towards proteins that suggests prevention of biofilm formation on its surface.
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Affiliation(s)
- Ana Kramar
- Department of Materials Science and Engineering and Chemical Engineering, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Spain; (N.M.F.); (J.G.-B.)
- Institute of Chemistry and Materials Álvaro Alonso Barba, IQMAAB, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Spain
| | | | - Nasrin Moshfeghi Far
- Department of Materials Science and Engineering and Chemical Engineering, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Spain; (N.M.F.); (J.G.-B.)
| | - Javier González-Benito
- Department of Materials Science and Engineering and Chemical Engineering, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Spain; (N.M.F.); (J.G.-B.)
- Institute of Chemistry and Materials Álvaro Alonso Barba, IQMAAB, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Spain
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3
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Boussouga YA, Okkali T, Luxbacher T, Schäfer AI. Chromium (III) and chromium (VI) removal and organic matter interaction with nanofiltration. Sci Total Environ 2023; 885:163695. [PMID: 37100133 DOI: 10.1016/j.scitotenv.2023.163695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 04/18/2023] [Accepted: 04/19/2023] [Indexed: 05/10/2023]
Abstract
Chromium (Cr) is a toxic inorganic contaminant for drinking water, in which the concentration has to be controlled for human health and safety. Cr retention was investigated with stirred cell experiments using sulphonated polyethersulfone nanofiltration (NF) membranes of different molecular weight cut-off (MWCO). Cr(III) and Cr(VI) retention follow the order of the MWCO of the studied NF membranes; HY70-720 Da > HY50-1000 Da > HY10-3000 Da with a pH dependency, especially for Cr(III). The importance of the charge exclusion was highlighted when Cr(OH)4- (for Cr(III)) and CrO42- (for Cr(VI)) was the predominant species in the feed solution. In presence of organic matter, namely humic acid (HA), Cr(III) retention increased by 60 %, while no influence of HA was observed for Cr(VI). HA did not induce major modifications on the membrane surface charge for these membranes. Solute-solute interaction, in particular Cr(III)-HA complexation, was the responsible mechanism for the increase in Cr(III) retention. This was confirmed by asymmetric flow field-flow fractionation, coupled with inductively coupled plasma mass spectrometry (FFFF-ICP-MS) analysis. Cr(III)-HA complexation was significant at HA concentrations as low as 1 mgC/L. The chosen NF membranes were able to achieve the EU guideline (25 μg/L) for Cr in drinking water for a feed concentration of 250 μg/L.
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Affiliation(s)
- Youssef-Amine Boussouga
- Institute for Advanced Membrane Technology (IAMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany.
| | - Timur Okkali
- Institute for Advanced Membrane Technology (IAMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | | | - Andrea I Schäfer
- Institute for Advanced Membrane Technology (IAMT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
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4
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Stróż A, Luxbacher T, Dudek K, Chmiela B, Osak P, Łosiewicz B. In Vitro Bioelectrochemical Properties of Second-Generation Oxide Nanotubes on Ti-13Zr-13Nb Biomedical Alloy. Materials (Basel) 2023; 16:1408. [PMID: 36837038 PMCID: PMC9966541 DOI: 10.3390/ma16041408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/04/2023] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
Surface charge and in vitro corrosion resistance are some of the key parameters characterizing biomaterials in the interaction of the implant with the biological environment. Hence, this work investigates the in vitro bioelectrochemical behavior of newly developed oxide nanotubes (ONTs) layers of second-generation (2G) on a Ti-13Zr-13Nb alloy. The 2G ONTs were produced by anodization in 1 M (NH4)2SO4 solution with 2 wt.% of NH4F. The physical and chemical properties of the obtained bamboo-inspired 2G ONTs were characterized using scanning electron microscopy with field emission and energy dispersive spectroscopy. Zeta potential measurements for the examined materials were carried out using an electrokinetic analyzer in aqueous electrolytes of potassium chloride, phosphate-buffered saline and artificial blood. It was found that the electrolyte type and the ionic strength affect the bioelectrochemical properties of 2G ONTs layers. Open circuit potential and anodic polarization curve results proved the influence of anodizing on the improvement of in vitro corrosion resistance of the Ti-13Zr-13Nb alloy in PBS solution. The anodizing conditions used can be proposed for the production of long-term implants, which are not susceptible to pitting corrosion up to 9.4 V.
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Affiliation(s)
- Agnieszka Stróż
- Faculty of Science and Technology, Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland
| | | | - Karolina Dudek
- Refractory Materials Center, Institute of Ceramics and Building Materials, Łukasiewicz Research Network, Toszecka 99, 44-100 Gliwice, Poland
| | - Bartosz Chmiela
- Insitute of Materials Science, Silesian University of Technology, Z. Krasińskiego 8, 40-019 Katowice, Poland
| | - Patrycja Osak
- Faculty of Science and Technology, Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland
| | - Bożena Łosiewicz
- Faculty of Science and Technology, Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland
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Ambrož A, Ban I, Luxbacher T. Assessment of the Capability of Magnetic Nanoparticles to Recover Neodymium Ions from Aqueous Solution. Acta Chim Slov 2022; 69:826-836. [PMID: 36562162 DOI: 10.17344/acsi.2022.7570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 10/18/2022] [Accepted: 10/19/2022] [Indexed: 12/14/2022] Open
Abstract
Magnetic nanoparticles (MNPs) have received increasing attention for various applications due to their fast synthesis, versatile functionalization, and recyclability by the application of a magnetic field. The high surface-to-volume ratio of MNP dispersions has suggested their use as an adsorbent for the removal of heavy metal ions. We investigated the applicability of MNPs composed of a maghemite core surrounded by a silica shell functionalized with aminopropylsilane, γ-Fe2O3-NH4OH@SiO2(APTMS), for the removal of neodymium ions (Nd3+) from aqueous solution. The MNPs were characterized for their size, composition, surface functionality and charge. Despite of the promising properties of MNPs, their removal from the aqueous dispersion with an external magnet was not sufficient to reliably quantify the adsorption of Nd3+ by UV-Vis spectroscopy.
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6
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Ajdnik U, Luxbacher T, Zemljič LF. Proteins at polysaccharide-based biointerfaces: A comparative study of QCM-D and electrokinetic measurements. Colloids Surf B Biointerfaces 2022; 221:113011. [DOI: 10.1016/j.colsurfb.2022.113011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/28/2022] [Accepted: 11/07/2022] [Indexed: 11/09/2022]
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7
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Sterenzon E, Vadivel VK, Gerchman Y, Luxbacher T, Narayanan R, Mamane H. Effective Removal of Acid Dye in Synthetic and Silk Dyeing Effluent: Isotherm and Kinetic Studies. ACS Omega 2022; 7:118-128. [PMID: 35036683 PMCID: PMC8757339 DOI: 10.1021/acsomega.1c04111] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Accepted: 12/01/2021] [Indexed: 06/14/2023]
Abstract
Here, we propose a low-cost, sustainable, and viable adsorbent (pine tree-derived biochar) to remove acid dyes such as acid violet 17 (AV), which is used in the silk dyeing industry. As a case study, the AV removal process was demonstrated using synthetic effluent and further as a proof of concept using real dye effluent produced from the Sirumugai textile unit in India. The pine tree-derived biochar was selected for removal of aqueous AV dye in batch and fixed-bed column studies. The adsorbent material was characterized for crystallinity (XRD), surface area (BET), surface morphology and elemental compositions (SEM-EDX), thermal stability (TGA), weight loss (DGA), and functional groups (FTIR). Batch sorption studies were performed to evaluate (i) adsorption at various pH values (at pH 2 to 7), (ii) isotherms (at 10, 25, and 35 °C) to assess the temperature effect on the sorption efficiency, and (iii) kinetics to reveal the effect of time, adsorbent dose, and initial concentration on the reaction rate. After systematic evaluation, 2 g/L biochar, 25 mg/L AV, pH 3, 40 °C, and 40 and 360 min in a completely mixed batch study resulted in 50 and 90% dye removal, respectively. The isoelectric point at pH 3.7 ± 0.2 results in maximum dye removal, therefore suggesting that monitoring the ratio of different effluent (acid/wash/dye) can improve the colorant removal efficiency. The Langmuir isotherm best fits with the sorption of AV to biochar, provided a maximal dye uptake of 29 mg/g at 40 °C, showing that adsorption was endothermic. Fixed-bed studies were conducted at room temperature with an initial dye concentration of 25 and 50 mg/L. The glass columns were packed with biochar (bed depth 20 cm, pore volume = 14 mL) at an initial pH of 5.0 and a 10 mL/min flow rate for 120 min. Finally, the regeneration of the adsorbent was achieved using desorption studies conducted under the proposed experimental conditions resulted in 90-93% removal of AV even after five cycles of regeneration.
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Affiliation(s)
- Elizaveta Sterenzon
- School
of Mechanical Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel
| | - Vinod Kumar Vadivel
- School
of Mechanical Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel
| | - Yoram Gerchman
- Department
of Biology and Environment, Faculty of Natural Science, University of Haifa and Oranim College, Tivon 3600600, Israel
| | - Thomas Luxbacher
- Anton
Paar GmbH, Anton Paar Str. 20, 8054 Graz, Austria
- Faculty
of Chemistry and Chemical Engineering, University
of Maribor, 2000 Maribor, Slovenia
| | - Ramsundram Narayanan
- Department
of Civil Engineering, Kumaraguru College
of Technology, Coimbatore, Tamil Nadu 641049, India
| | - Hadas Mamane
- School
of Mechanical Engineering, Faculty of Engineering, Tel Aviv University, Tel Aviv 69978, Israel
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8
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Singh N, Gopani PH, Sarma HK, Mattey P, Negi DS, Srivastava VR, Luxbacher T. Charging behaviour at the carbonate rock‐water interface in low‐salinity waterflooding: Estimation of zeta potential in high‐salinity brines. CAN J CHEM ENG 2021. [DOI: 10.1002/cjce.24311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Navpreet Singh
- Department of Chemical and Petroleum Engineering University of Calgary Calgary Alberta Canada
| | - Paras H. Gopani
- Department of Chemical and Petroleum Engineering University of Calgary Calgary Alberta Canada
| | - Hemanta K. Sarma
- Department of Chemical and Petroleum Engineering University of Calgary Calgary Alberta Canada
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9
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Ban M, Luxbacher T, Lützenkirchen J, Viani A, Bianchi S, Hradil K, Rohatsch A, Castelvetro V. Evolution of calcite surfaces upon thermal decomposition, characterized by electrokinetics, in-situ XRD, and SEM. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126761] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Ajdnik U, Luxbacher T, Vesel A, Štern A, Žegura B, Trček J, Fras Zemljič L. Polysaccharide-Based Bilayer Coatings for Biofilm-Inhibiting Surfaces of Medical Devices. Materials (Basel) 2021; 14:4720. [PMID: 34443242 PMCID: PMC8398363 DOI: 10.3390/ma14164720] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 08/17/2021] [Accepted: 08/18/2021] [Indexed: 01/16/2023]
Abstract
Chitosan (Chi) and 77KS, a lysine-derived surfactant, form polyelectrolyte complexes that reverse their charge from positive to negative at higher 77KS concentrations, forming aggregates that have been embedded with amoxicillin (AMOX). Dispersion of this complex was used to coat polydimethylsiloxane (PDMS) films, with an additional layer of anionic and hydrophilic hyaluronic acid (HA) as an outer adsorbate layer to enhance protein repulsion in addition to antimicrobial activity by forming a highly hydrated layer in combination with steric hindrance. The formed polysaccharide-based bilayer on PDMS was analyzed by water contact angle measurements, X-ray photoelectron spectroscopy (XPS), and surface zeta (ζ)-potential. All measurements show the existence and adhesion of the two layers on the PDMS surface. Part of this study was devoted to understanding the underlying protein adsorption phenomena and identifying the mechanisms associated with biofouling. Thus, the adsorption of a mixed-protein solution (bovine serum albumin, fibrinogen, γ-globulin) on PDMS surfaces was studied to test the antifouling properties. The adsorption experiments were performed using a quartz crystal microbalance with dissipation monitoring (QCM-D) and showed improved antifouling properties by these polysaccharide-based bilayer coatings compared to a reference or for only one layer, i.e., the complex. This proves the benefit of a second hyaluronic acid layer. Microbiological and biocompatibility tests were also performed on real samples, i.e., silicone discs, showing the perspective of the prepared bilayer coating for medical devices such as prostheses, catheters (balloon angioplasty, intravascular), delivery systems (sheaths, implants), and stents.
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Affiliation(s)
- Urban Ajdnik
- Institute of Engineering Materials and Design, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
| | | | - Alenka Vesel
- Department of Surface Engineering and Optoelectronics, Jožef Stefan Institute, Teslova 30, 1000 Ljubljana, Slovenia;
| | - Alja Štern
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna Pot 111, 1000 Ljubljana, Slovenia; (A.Š.); (B.Ž.)
| | - Bojana Žegura
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna Pot 111, 1000 Ljubljana, Slovenia; (A.Š.); (B.Ž.)
| | - Janja Trček
- Department of Biology, Faculty of Natural Sciences and Mathematics, University of Maribor, Koroška cesta 160, 2000 Maribor, Slovenia;
| | - Lidija Fras Zemljič
- Institute of Engineering Materials and Design, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
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11
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Črešnar KP, Bek M, Luxbacher T, Brunčko M, Zemljič LF. Insight into the Surface Properties of Wood Fiber-Polymer Composites. Polymers (Basel) 2021; 13:polym13101535. [PMID: 34064585 PMCID: PMC8151087 DOI: 10.3390/polym13101535] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 04/30/2021] [Accepted: 05/05/2021] [Indexed: 12/03/2022] Open
Abstract
The surface properties of wood fiber (WF) filled polymer composites depend on the filler loading and are closely related to the distribution and orientation in the polymer matrix. In this study, wood fibers (WF) were incorporated into thermoplastic composites based on non-recycled polypropylene (PP) and recycled (R-PP) composites by melt compounding and injection moulding. ATR-FTIR (attenuated total reflection Fourier transform infrared spectroscopy) measurements clearly showed the propagation of WF functional groups at the surface layer of WF-PP/WF-R-PP composites preferentially with WF loading up to 30%. Optical microscopy and nanoindentation method confirmed the alignment of thinner skin layer of WF-PP/WF-R-PP composites with increasing WF addition. The thickness of the skin layer was mainly influenced by the WF loading. The effect of the addition of WF on modulus and hardness, at least at 30 and 40 wt.%, varies for PP and R-PP matrix. On the other hand, surface zeta potential measurements show increased hydrophilicity with increasing amounts of WF. Moreover, WF in PP/R-PP matrix is also responsible for the antioxidant properties of these composites as measured by DPPH (2,2′-diphenyl-1-picrylhydrazyl) assay.
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Affiliation(s)
- Klementina Pušnik Črešnar
- Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia; (T.L.); (M.B.)
- Correspondence: (K.P.Č.); (L.F.Z.); Tel.: +386-2-220-7607 (K.P.Č.)
| | - Marko Bek
- Faculty of Mechanical Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia;
| | - Thomas Luxbacher
- Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia; (T.L.); (M.B.)
- Faculty of Chemistry and Chemical Technology, University of Maribor, 2000 Maribor, Slovenia
- Anton Paar GmbH, A-8054 Graz, Austria
| | - Mihael Brunčko
- Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia; (T.L.); (M.B.)
| | - Lidija Fras Zemljič
- Faculty of Mechanical Engineering, University of Maribor, 2000 Maribor, Slovenia; (T.L.); (M.B.)
- Correspondence: (K.P.Č.); (L.F.Z.); Tel.: +386-2-220-7607 (K.P.Č.)
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12
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Plohl O, Zemljič LF, Potrč S, Luxbacher T. Applicability of electro-osmotic flow for the analysis of the surface zeta potential. RSC Adv 2020; 10:6777-6789. [PMID: 35493873 PMCID: PMC9049723 DOI: 10.1039/c9ra10414c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Accepted: 02/06/2020] [Indexed: 12/16/2022] Open
Abstract
The analysis of the surface zeta potential (SZP) opens up new possibilities in the characterization of various materials used for scientific or industrial applications. It provides at the same time insight into the material surface chemistry and elucidates the interactions with charged species in the aqueous test solution. For this purpose, an accurate, reliable and repeatable analysis of the SZP is the key factor. This work focuses on a detailed and systematic comparison of two electrokinetic techniques, i.e. the mapping of the electro-osmotic flow (EOF) and the measurement of the streaming potential (SP), for the surface zeta potential (SZP) determination of several materials with varying properties. Both techniques have advantages as well as drawbacks. The applicability of latex polymer material and inorganic tracer particles at varying ionic strength, the interaction between oppositely charged tracer particles and solid surfaces, the assessment of the pH dependence of the SZP and the isoelectric point (IEP), and the effects of sample porosity and conductance have been investigated. Although in some cases the EOF method gives a SZP similar to the streaming potential measurement, especially when the tracer particle exhibits the same charge as the solid surface, it was revealed that reliable results were only obtained with the streaming potential and streaming current method. Several obstacles such as elevated conductivity at higher ionic strength, the applied voltage for the EM measurement, and the nature of tracer particles lower the accuracy and reliability of the SZP determined by the EOF method. It was shown that the EOF method is not applicable to oppositely charged surface and tracer particles and also limited to low salinity conditions especially when using polymeric tracer particles. Although the EOF method does not require the formation of a capillary flow channel, it disables a non-destructive SZP of fragile or valuable samples, such as QCM-D sensors, in comparison to the SP approach. Detail comparison of two different electrokinetic phenomena EOF and SP method for the SZP determination with taking into account various materials with different surface and bulk properties.![]()
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Affiliation(s)
- Olivija Plohl
- University of Maribor, Faculty of Mechanical Engineering, Laboratory for Characterization and Processing of Polymers Smetanova 17 2000 Maribor Slovenia
| | - Lidija Fras Zemljič
- University of Maribor, Faculty of Mechanical Engineering, Laboratory for Characterization and Processing of Polymers Smetanova 17 2000 Maribor Slovenia
| | - Sanja Potrč
- University of Maribor, Faculty of Mechanical Engineering, Laboratory for Characterization and Processing of Polymers Smetanova 17 2000 Maribor Slovenia .,University of Maribor, Faculty of Chemistry and Chemical Engineering Smetanova 17 2000 Maribor Slovenia
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13
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Zemljič LF, Plohl O, Vesel A, Luxbacher T, Potrč S. Physicochemical Characterization of Packaging Foils Coated by Chitosan and Polyphenols Colloidal Formulations. Int J Mol Sci 2020; 21:E495. [PMID: 31941018 PMCID: PMC7014365 DOI: 10.3390/ijms21020495] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 01/09/2020] [Accepted: 01/09/2020] [Indexed: 12/27/2022] Open
Abstract
In this research, antimicrobial polysaccharide chitosan was used as a surface coating for packaging material. The aim of our research was to establish an additive formulation of chitosan and antioxidative plant extracts as dispersion of nanoparticles. Chitosan nanoparticles with embedded thyme, rosemary and cinnamon extracts were synthesized, and characterized for this purpose. Two representative, commercially used foils, polypropylene (PP) and polyethylene (PE), previously activated by UV/ozone to improve coating adhesion, were functionalized using chitosan-extracts nanoparticle dispersions. The foils were coated by two layers. A solution of macromolecular chitosan was applied onto foils as a first layer, followed by the deposition of various extracts embedded into chitosan nanoparticles that were attached as an upper layer. Since active packaging must assure bioactive efficiency at the interface with food, it is extremely important to understand the surface characteristics and phenomena of functionalized foils. The physico-chemical analyses of functionalized foils were thus comprised of surface elemental composition, surface charge, wettability, as well as surface morphology. It has been shown that coatings were applied successfully with an elemental composition, surface charge and morphology that should enable coating stability, homogeneity and consequently provide an active concept of the packaging surface in contact with food. Moreover, the wettability of foils was improved in order to minimize the anti-fogging behavior.
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Affiliation(s)
- Lidija Fras Zemljič
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia; (O.P.); (S.P.)
| | - Olivija Plohl
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia; (O.P.); (S.P.)
| | - Alenka Vesel
- Department of Surface Engineering and Optoelectronics, Jožef Stefan Institute, Teslova 30, SI-1000 Ljubljana, Slovenia;
| | | | - Sanja Potrč
- Laboratory for Characterization and Processing of Polymers, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia; (O.P.); (S.P.)
- Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova 17, SI-2000 Maribor, Slovenia
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14
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Sandri G, Rossi S, Bonferoni MC, Miele D, Faccendini A, Del Favero E, Di Cola E, Icaro Cornaglia A, Boselli C, Luxbacher T, Malavasi L, Cantu’ L, Ferrari F. Chitosan/glycosaminoglycan scaffolds for skin reparation. Carbohydr Polym 2019; 220:219-227. [DOI: 10.1016/j.carbpol.2019.05.069] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Revised: 05/11/2019] [Accepted: 05/23/2019] [Indexed: 01/01/2023]
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15
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Arlt B, Luxbacher T. Nachweis und Verfolgung von Membran‐Fouling. CHEM-ING-TECH 2019. [DOI: 10.1002/cite.201900026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bastian Arlt
- Anton Paar Germany GmbHNanostruktur- & Oberflächenanalyse Hellmuth-Hirth-Straße 6 73760 Ostfildern Deutschland
| | - Thomas Luxbacher
- Anton Paar GmbHSurface Analysis Anton-Paar-Straße 20 8054 Graz Österreich
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16
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Peretz R, Sterenzon E, Gerchman Y, Kumar Vadivel V, Luxbacher T, Mamane H. Nanocellulose production from recycled paper mill sludge using ozonation pretreatment followed by recyclable maleic acid hydrolysis. Carbohydr Polym 2019; 216:343-351. [PMID: 31047075 DOI: 10.1016/j.carbpol.2019.04.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 03/26/2019] [Accepted: 04/01/2019] [Indexed: 10/27/2022]
Abstract
Nanocellulose (NC) have garnered much interest worldwide due to its physical and chemical properties. Nanocellulose is produced from biomass materials by bleaching pretreatment, followed by acid hydrolysis. This work demonstrated the production of NC from recycled paper sludge (RPS), a crystalline cellulose rich waste, by ozonation pretreatment, followed by maleic acid hydrolysis. Ozonation resulted in removal of lignin (as evident by TGA analysis), negative zeta potential of RPS and enhanced NC production, from 60 mg/L to over 80 mg/L after 60-120 min of ozone treatment. Maleic acid was successfully recovered, although longer ozonation times reduced the amount of acid available for recovery. These results demonstrate that ozonation can be used as an effective pretreatment for NC production.
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Affiliation(s)
- Roi Peretz
- School of Mechanical Engineering, Faculty of Engineering and Water Research Center, Tel Aviv University, Tel Aviv 69978, Israel
| | - Elizaveta Sterenzon
- School of Mechanical Engineering, Faculty of Engineering and Water Research Center, Tel Aviv University, Tel Aviv 69978, Israel
| | - Yoram Gerchman
- Department of Biology and Environment, Faculty of Natural Sciences, University of Haifa-Oranim, Tivon 3600600, Israel.
| | - Vinod Kumar Vadivel
- School of Mechanical Engineering, Faculty of Engineering and Water Research Center, Tel Aviv University, Tel Aviv 69978, Israel
| | | | - Hadas Mamane
- School of Mechanical Engineering, Faculty of Engineering and Water Research Center, Tel Aviv University, Tel Aviv 69978, Israel
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17
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Dandapat A, Horovitz I, Gnayem H, Sasson Y, Avisar D, Luxbacher T, Mamane H. Solar Photocatalytic Degradation of Trace Organic Pollutants in Water by Bi(0)-Doped Bismuth Oxyhalide Thin Films. ACS Omega 2018; 3:10858-10865. [PMID: 31459198 PMCID: PMC6645048 DOI: 10.1021/acsomega.8b00759] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 08/21/2018] [Indexed: 06/10/2023]
Abstract
Herein, we demonstrate the fabrication of Bi(0)-doped bismuth oxyhalide solid solution films for the removal of trace organic pollutants (TrOPs) in water. With the advantage of a viscous AlOOH sol, very high loadings (75 wt %) of bismuth oxyhalides were embedded within the thin films and calcined at 500 °C to develop porous alumina composite coatings. Various concentrations of Bi(0) doping were tested for their photocatalytic activity. Seven TrOPs including iopromide (IPRM), iohexol (IHX), iopamidol (IPMD), sulfamethoxazole (SMX), carbamazepine, venlafaxine, and bezafibrate (BZF) were selected for this study based on their occurrence and detection in effluents and surface waters worldwide. In all tests, with the exception of IPRM, 3% Bi(0)-doped BiOCl0.875Br0.125 showed highest activity, which can be attributed to its unique, highly organized, and compact morphology besides its well-matched energy band positions. Although IPMD, IHX, IPRM, and SMX are susceptible to photolysis, still the photocatalytic activity significantly augmented the removal of all tested compounds. In addition, analysis of the surface charge excluded electrostatic interactions and confirmed the ion-exchange adsorption mechanism for the high degradation rate of BZF in the presence of bismuth oxyhalides.
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Affiliation(s)
- Anirban Dandapat
- Department
of Biotechnology, Bhimtal Campus, Kumaun
University, Nainital, Uttarakhand 263136, India
| | - Inna Horovitz
- School of Mechanical Engineering,
Faculty of Engineering, and The Water Research
Center, School of Earth Sciences, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Hani Gnayem
- Casali
Center of Applied Chemistry, Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Yoel Sasson
- Casali
Center of Applied Chemistry, Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Dror Avisar
- School of Mechanical Engineering,
Faculty of Engineering, and The Water Research
Center, School of Earth Sciences, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | | | - Hadas Mamane
- School of Mechanical Engineering,
Faculty of Engineering, and The Water Research
Center, School of Earth Sciences, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
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18
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Imbrogno A, Tiraferri A, Abbenante S, Weyand S, Schwaiger R, Luxbacher T, Schäfer AI. Organic fouling control through magnetic ion exchange‐nanofiltration (MIEX‐NF) in water treatment. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2017.12.041] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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19
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Petrinić I, Bukšek H, Luxbacher T, Pušić T, Bischof S. Influence of the structure of polymer fiber composites on the analysis of the zeta potential. J Appl Polym Sci 2018. [DOI: 10.1002/app.46227] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Irena Petrinić
- Faculty of Chemistry and Chemical Engineering; University of Maribor; Maribor 2000 Slovenia
| | - Hermina Bukšek
- Faculty of Chemistry and Chemical Engineering; University of Maribor; Maribor 2000 Slovenia
| | | | - Tanja Pušić
- Faculty of Textile Technology; University of Zagreb; Zagreb 10000 Croatia
| | - Sandra Bischof
- Faculty of Textile Technology; University of Zagreb; Zagreb 10000 Croatia
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20
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Jachimska B, Świątek S, Loch JI, Lewiński K, Luxbacher T. Adsorption effectiveness of β-lactoglobulin onto gold surface determined by quartz crystal microbalance. Bioelectrochemistry 2018; 121:95-104. [PMID: 29413868 DOI: 10.1016/j.bioelechem.2018.01.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2017] [Revised: 12/20/2017] [Accepted: 01/22/2018] [Indexed: 12/30/2022]
Abstract
Bovine β-lactoglobulin (LGB) is a transport protein that can bind to its structure hydrophobic bioactive molecules. Due to the lack of toxicity, high stability and pH-dependent molecular binding mechanism, lactoglobulin can be used as a carrier of sparingly soluble drugs. Dynamic light scattering has confirmed LGB's tendency to create oligomeric forms. The hydrodynamic diameter of LGB molecules varies from 4 nm to 6 nm in the pH range of 2-10 and ionic strength I = 0.001-0.15 M, which corresponds to the presence of mono or dimeric LGB forms. The LGB zeta potential varies from 26.5 mV to -33.3 mV for I = 0.01 M and from 13.3 mV to -16 mV for I = 0.15 M in the pH range of 2-10. The isoelectric point is at pH 4.8. As a result of strong surface charge compensation, the maximum effective ionization degree of the LGB molecule is 35% for ionic strength I = 0.01 M and 22% for I = 0.15 M. The effectiveness of adsorption is linked with the properties of the protein, as well as those of the adsorption surface. The functionalization of gold surfaces with β-lactoglobulin (LGB) was studied using a quartz crystal microbalance with energy dissipation monitoring (QCM-D). The effectiveness of LGB adsorption correlates strongly with a charge of gold surface and the zeta potential of the molecule. The greatest value of the adsorbed mass was observed in the pH range in which LGB has a positive zeta potential values, below pH 4.8. This observation shows that electrostatic interactions play a dominant role in LGB adsorption on gold surfaces. Based on the adsorbed mass, protein orientation on gold surfaces was determined. The preferential side-on orientation of LGB molecules observed in the adsorption layer is consistent with the direction of the molecule dipole momentum determined by molecular dynamics simulations of the protein (MD). The use of the QCM-D method also allowed us to determine the effectiveness of adsorption of LGB on gold surface. Knowing the mechanism of LGB adsorption is significant importance for determining the optimum conditions for immobilizing this protein on solid surfaces. As β-lactoglobulin is a protein that binds various ligands, the binding properties of immobilized β-lactoglobulin can be used to design controlled protein structures for biomedical applications.
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Affiliation(s)
- B Jachimska
- Jerzy Haber Institute of Catalysis and Surface Chemistry, PAS, Niezapominajek 8, 30-239 Cracow, Poland.
| | - S Świątek
- Jerzy Haber Institute of Catalysis and Surface Chemistry, PAS, Niezapominajek 8, 30-239 Cracow, Poland
| | - J I Loch
- Jagiellonian University, Faculty of Chemistry, Department of Crystal Chemistry and Crystal Physics, Biocrystallography Group, Ingardena 3, 30-060 Cracow, Poland
| | - K Lewiński
- Jagiellonian University, Faculty of Chemistry, Department of Crystal Chemistry and Crystal Physics, Biocrystallography Group, Ingardena 3, 30-060 Cracow, Poland
| | - T Luxbacher
- Anton Paar GmbH, Anton-Paar-Strasse 20, 8045 Graz, Austria
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21
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Owusu-Agyeman I, Jeihanipour A, Luxbacher T, Schäfer AI. Implications of humic acid, inorganic carbon and speciation on fluoride retention mechanisms in nanofiltration and reverse osmosis. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2016.12.043] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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22
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Espanol M, Mestres G, Luxbacher T, Dory JB, Ginebra MP. Impact of Porosity and Electrolyte Composition on the Surface Charge of Hydroxyapatite Biomaterials. ACS Appl Mater Interfaces 2016; 8:908-917. [PMID: 26684866 DOI: 10.1021/acsami.5b10404] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The success or failure of a material when implanted in the body is greatly determined by the surface properties of the material and the host tissue reactions. The very first event that takes place after implantation is the interaction of soluble ions, molecules and proteins from the biological environment with the material surface leading to the formation of an adsorbed protein layer that will later influence cell attachment. In this context, the particular topography and surface charge of a material become critical as they influence the nature of the proteins that will adsorb. However, very limited information is available on the surface charge of porous substrates. Only until very recently was the determination of the zeta potential on porous membranes accurately determined. The goal of this work was to implement the previous findings for the determination of the zeta potential of a series of porous hydroxyapatite (HA) substrates and to assess how porosity affects the measurements. In addition, studies using various electrolytes were also performed to prove how the specific affinity of certain ions for HA can further impact surface charge. The results showed that all materials exhibited very similar external surface charge (approximately -23 mV), consistent with their almost identical topographies. However, the presence of interconnected pores underneath the sample surface resulted in an additional internal zeta potential that varied with the porosity content. Measurements with different electrolytes confirmed the selectivity of divalent ions for HA underlying the importance of testing biomaterials using relevant electrolytes.
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Affiliation(s)
- Montserrat Espanol
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, Technical University of Catalonia (UPC) , Avinguda Diagonal 647, 08028 Barcelona, Spain
- Centre for Research in Nanoengineering, Technical University of Catalonia (CRNE-UPC) , Pascual i Vila 15, 08028 Barcelona, Spain
| | - Gemma Mestres
- Department of Engineering Sciences, Uppsala University , 751 21 Uppsala, Sweden
| | | | - Jean-Baptiste Dory
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, Technical University of Catalonia (UPC) , Avinguda Diagonal 647, 08028 Barcelona, Spain
| | - Maria-Pau Ginebra
- Biomaterials, Biomechanics and Tissue Engineering Group, Department of Materials Science and Metallurgical Engineering, Technical University of Catalonia (UPC) , Avinguda Diagonal 647, 08028 Barcelona, Spain
- Centre for Research in Nanoengineering, Technical University of Catalonia (CRNE-UPC) , Pascual i Vila 15, 08028 Barcelona, Spain
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23
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Lorenzetti M, Bernardini G, Luxbacher T, Santucci A, Kobe S, Novak S. Surface properties of nanocrystalline TiO2 coatings in relation to the in vitro plasma protein adsorption. ACTA ACUST UNITED AC 2015. [PMID: 26225819 DOI: 10.1088/1748-6041/10/4/045012] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
This study reports on the selective adsorption of whole plasma proteins on hydrothermally (HT) grown TiO2-anatase coatings and its dependence on the three main surface properties: surface charge, wettability and roughness. The influence of the photo-activation of TiO2 by UV irradiation was also evaluated. Even though the protein adhesion onto Ti-based substrates was only moderate, better adsorption of any protein (at pH = 7.4) occurred for the most negatively charged and hydrophobic substrate (Ti non-treated) and for the most nanorough and hydrophilic surface (HT Ti3), indicating that the mutual action of the surface characteristics is responsible for the attraction and adhesion of the proteins. The HT coatings showed a higher adsorption of certain proteins (albumin 'passivation' layer, apolipoproteins, vitamin D-binding protein, ceruloplasmin, α-2-HS-glycoprotein) and higher ratios of albumin to fibrinogen and albumin to immunoglobulin γ-chains. The UV pre-irradiation affected the surface properties and strongly reduced the adsorption of the proteins. These results provide in-depth knowledge about the characterization of nanocrystalline TiO2 coatings for body implants and provide a basis for future studies on the hemocompatibility and biocompatibility of such surfaces.
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Affiliation(s)
- M Lorenzetti
- Department for Nanostructured Materials, Jožef Stefan Institute, Jamova cesta 39, 1000 Ljubljana, Slovenia. Jožef Stefan International Postgraduate School, Jamova cesta 39, Ljubljana 1000, Slovenia
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24
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Lorenzetti M, Luxbacher T, Kobe S, Novak S. Electrokinetic behaviour of porous TiO2-coated implants. J Mater Sci Mater Med 2015; 26:191. [PMID: 25989934 DOI: 10.1007/s10856-015-5521-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 03/17/2015] [Indexed: 06/04/2023]
Abstract
It is known that the "race for the surface" determining the in vivo response is strictly connected to the physico-chemical properties of the material, especially at its surface. Accordingly, the study of surface roughness, charge and wettability is fundamental to predict the bio-response to the implant. In this work, streaming potential was chosen as a reliable method to quantify the solid surface charge of hydrothermally treated (HT) TiO2-anatase nano-crystalline coatings, grown on titanium substrates. The influence of metal and ionic conductance on the zeta potential values was taken into account, allowing for the correlation of the surface charge with the coating porosity, the semiconductor character of the TiO2 nano-crystals and the metallic nature of the bulk titanium.
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Affiliation(s)
- Martina Lorenzetti
- Department for Nanostructured Materials, Jožef Stefan Institute, Jamova cesta 39, 1000, Ljubljana, Slovenia,
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25
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Coday BD, Luxbacher T, Childress AE, Almaraz N, Xu P, Cath TY. Indirect determination of zeta potential at high ionic strength: Specific application to semipermeable polymeric membranes. J Memb Sci 2015. [DOI: 10.1016/j.memsci.2014.12.047] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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26
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Pedimonte BJ, Moest T, Luxbacher T, von Wilmowsky C, Fey T, Schlegel KA, Greil P. Morphological zeta-potential variation of nanoporous anodic alumina layers and cell adherence. Acta Biomater 2014; 10:968-74. [PMID: 24080316 DOI: 10.1016/j.actbio.2013.09.023] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Revised: 08/01/2013] [Accepted: 09/19/2013] [Indexed: 11/15/2022]
Abstract
Nanoscale surface modification of biomedical implant materials offers enhanced biological activity concerning protein adsorption and cell adherence. Nanoporous anodic alumina oxide (AAO) layers were prepared by electrochemical oxidation of thin Al-seed layers in 0.22 M C2H2O4, applying anodization voltages of 20-60 V. The AAO layers are characterized by a mean pore diameter varying from 15 to 40 nm, a mean pore distance of 40-130 nm, a total porosity of ≈ 10% and a thickness of 560 ± 40 nm. Zeta potential and isoelectric point (iep) were derived from streaming potential measurements and correlated to the topology variation of the nanoporous AAO layers. With decreasing pore diameter a shift of iep from ≈ 7.9 (pore diameter 40 nm) to ≈ 6.7 (pore diameter 15 nm) was observed. Plain alumina layers, however, possess an iep of ≈ 9. Compared to the plain alumina surface an enhanced adherence and activity of hFOB cells was observed on the nanoporous AAO after 24h culture with a maximum at a pore size of 40 nm. The topology-induced change of the electrochemical surface state may have a strong impact on protein adsorption as well as on cell adhesion, which offers a high potential for the development of bioactive AAO coatings on various biomaterial substrates.
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Affiliation(s)
- Birgit Joana Pedimonte
- Department of Materials Science (Glass and Ceramics), University of Erlangen-Nuernberg, Martens-str. 5, 91054 Erlangen, Germany.
| | - Tobias Moest
- Department of Oral and Maxillofacial Surgery, Medical Faculty, University of Erlangen-Nuernberg, Glückstr. 11, 91054 Erlangen, Germany
| | | | - Cornelius von Wilmowsky
- Department of Oral and Maxillofacial Surgery, Medical Faculty, University of Erlangen-Nuernberg, Glückstr. 11, 91054 Erlangen, Germany
| | - Tobias Fey
- Department of Materials Science (Glass and Ceramics), University of Erlangen-Nuernberg, Martens-str. 5, 91054 Erlangen, Germany
| | - Karl Andreas Schlegel
- Department of Oral and Maxillofacial Surgery, Medical Faculty, University of Erlangen-Nuernberg, Glückstr. 11, 91054 Erlangen, Germany
| | - Peter Greil
- Department of Materials Science (Glass and Ceramics), University of Erlangen-Nuernberg, Martens-str. 5, 91054 Erlangen, Germany
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27
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Jirka I, Vandrovcová M, Frank O, Tolde Z, Plšek J, Luxbacher T, Bačáková L, Starý V. On the role of Nb-related sites of an oxidized β-TiNb alloy surface in its interaction with osteoblast-like MG-63 cells. Materials Science and Engineering: C 2013; 33:1636-45. [DOI: 10.1016/j.msec.2012.12.073] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 11/06/2012] [Accepted: 12/20/2012] [Indexed: 11/27/2022]
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28
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Bauman M, Košak A, Lobnik A, Petrinić I, Luxbacher T. Nanofiltration membranes modified with alkoxysilanes: Surface characterization using zeta-potential. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2013.01.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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29
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Bukšek H, Luxbacher T, Petrinić I. Zeta potential determination of polymeric materials using two differently designed measuring cells of an electrokinetic analyzer. Acta Chim Slov 2010; 57:700-706. [PMID: 24061819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023] Open
Abstract
The so-called zeta potential can be determined through electrokinetic measurements and indicates the status regarding surface charges along the interface between solids and liquids. Surface charge gives us information about the condition, quality, and characteristics of a macroscopic surface in the polar medium. In our study the zeta potential was determined using a "SurPASS" electrokinetic analyzer based on the streaming current and streaming potential measurements. The aim of the research was to compare the results of two differently designed measuring cells ("Adjustable Gap Cell" and "Clamping Cell") but operating on the same principle. In order to investigate this problem, the zeta potential was determined for the three polymeric materials: poly(ethylene terephthalate) foil, thin-film polyamide composite membranes for nanofiltration and reverse osmosis. The results obtained with "Clamping Cell" versus "Adjustable Gap Cell" showed differences in zeta potential, where the "Adjustable Gap Cell" gave more reproducible results. One reason for this behaviour could be the different geometries of the streaming channels. A more likely reason is the design of the "Clamping Cell", that requires a sample size larger than necessary for zeta potential determination.
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30
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Yaroshchuk A, Luxbacher T. Interpretation of electrokinetic measurements with porous films: role of electric conductance and streaming current within porous structure. Langmuir 2010; 26:10882-10889. [PMID: 20459082 DOI: 10.1021/la100777z] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
It is shown that in tangential electrokinetic measurements with porous films the porous structure makes contribution not only to the cell electric conductance (as demonstrated previously) but also to the observed streaming current. Both of these contributions give rise to dependences of streaming-potential and streaming-current coefficients on the channel height. However, due to the combined contribution of two phenomena, the dependence of streaming-potential coefficient on the channel height may be rather complicated and not allow for simple extrapolation. At the same time, the dependences of streaming-current coefficient and cell electric conductance on the channel height turn out linear and can be easily extrapolated to zero channel heights. This enables one to determine separately the contributions of external surface of porous film and of its porous structure to the streaming current and of the channel and porous structure to the cell electric conductance. This procedure is illustrated by the measurements of tangential electrokinetic phenomena and electric conductance with Millipore mixed-cellulose membrane filters of various average pore sizes (from 0.025 to 5 mum) in the so-called adjustable-gap cell of SurPASS electrokinetic instrument (Anton Paar GmbH). The design of this cell allows for easy and quasi-continuous variation of channel height as well as accurate determination of cell electric conductance, streaming-current coefficient, and channel height (from the cell hydraulic permeability). The quality of linear fits of experimental data has been found to be very good, and thus, the extrapolation procedures were quite reliable and accurate. Zeta-potentials could be determined of both external film and internal pore surfaces. It is demonstrated that the porous structures make considerable contributions to both streaming-current coefficient and cell electric conductance especially in the case of filters with larger pores. It is also found that, rather surprisingly, in filters with smaller pores the reduction in the filter electric conductivity turns out essentially stronger than could be expected proceeding from the filter porosity.
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Affiliation(s)
- Andriy Yaroshchuk
- ICREA and Department of Chemical Engineering, Universitat Politècnica de Catalunya, Barcelona, Spain
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31
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Xie HG, Li XX, Lv GJ, Xie WY, Zhu J, Luxbacher T, Ma R, Ma XJ. Effect of surface wettability and charge on protein adsorption onto implantable alginate-chitosan-alginate microcapsule surfaces. J Biomed Mater Res A 2010; 92:1357-65. [PMID: 19353563 DOI: 10.1002/jbm.a.32437] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Alginate-chitosan-alginate (ACA) microcapsules have been developed as a device for the transplantation of living cells. However, protein adsorption onto the surface of microcapsules immediately upon their implantation decides their ultimate biocompatibility. In this work, the chemical composition of the ACA membranes was determined using X-ray photoelectron spectroscopy (XPS). The surface wettability and charge were determined by contact angle and zeta potential measurements, respectively. Then, the effects of surface wettability and charge on bovine fibrinogen (Fgn) and gamma globulin (IgG) adsorption onto ACA microcapsules were evaluated. The results showed that ACA microcapsules had a hydrophilic membrane. So, the surface wettability of ACA microcapsules had little effect on protein adsorption. There was a negative zeta potential of ACA microcapsules which varies with the viscosity or G content of alginate used, indicating a varying degree of net negatively charged groups on the surface of ACA microcapsules. The amount of adsorbed protein increased with increasing of positive charge. Furthermore, the interaction between proteins and ACA microcapsules is dominated by electrostatic repulsion at pH 7.4 and that is of electrostatic attraction at pH 6.0. This work could help to explain the bioincompatibility of ACA microcapsules and will play an important role in the optimization of the microcapsule design.
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Affiliation(s)
- Hong-Guo Xie
- Biotechnology Division, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, People's Republic of China
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Wang Y, Guo L, Ren L, Yin S, Ge J, Gao Q, Luxbacher T, Luo S. A study on the performance of hyaluronic acid immobilized chitosan film. Biomed Mater 2009; 4:035009. [DOI: 10.1088/1748-6041/4/3/035009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Verliefde A, Cornelissen E, Heijman S, Petrinic I, Luxbacher T, Amy G, Van der Bruggen B, van Dijk J. Influence of membrane fouling by (pretreated) surface water on rejection of pharmaceutically active compounds (PhACs) by nanofiltration membranes. J Memb Sci 2009. [DOI: 10.1016/j.memsci.2008.12.039] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wegmann M, Michen B, Luxbacher T, Fritsch J, Graule T. Modification of ceramic microfilters with colloidal zirconia to promote the adsorption of viruses from water. Water Res 2008; 42:1726-34. [PMID: 17996271 DOI: 10.1016/j.watres.2007.10.030] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2007] [Revised: 10/22/2007] [Accepted: 10/22/2007] [Indexed: 05/08/2023]
Abstract
The purpose of this study was to test the feasibility of modifying commercial microporous ceramic bacteria filters to promote adsorption of viruses. The internal surface of the filter medium was coated with ZrO(2) nanopowder via dip-coating and heat-treatment in order to impart a filter surface charge opposite to that of the target viruses. Streaming potential measurements revealed a shift in the isoelectric point from pH <3 to between pH 5.5 and 9, respectively. While the base filter elements generally exhibited only 75% retention with respect to MS2 bacteriophages, the modified elements achieved a 7log removal (99.99999%) of these virus-like particles. The coating process also increased the specific surface area of the filters from approximately 2m(2)/g to between 12.5 and 25.5m(2)/g, thereby also potentially increasing their adsorption capacity. The results demonstrate that, given more development effort, the chosen manufacturing process has the potential to yield effective virus filters with throughputs superior to those of current virus filtration techniques.
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Affiliation(s)
- Markus Wegmann
- Swiss Federal Laboratories for Materials Testing and Research, CH-8600 Dübendorf, Switzerland
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Luxbacher T, Fritzer HP, Riehl JP, Flint CD. The angular dependence of the multipole-multipole interaction for energy transfer. Theor Chem Acc 1999. [DOI: 10.1007/s002140050520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Luxbacher T, Fritzer HP, Sabry-Grant R, Flint CD. Fast cross relaxation in lanthanide hexachloroelpasolites: application of the shell model. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(95)00601-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Luxbacher T, Fritzer HP, Flint CD. Vibronic intensities in the optical absorption spectra of Pr3+ in Cs2NaPrxY1−xCl6: concentration and temperature dependence. Chem Phys Lett 1995. [DOI: 10.1016/0009-2614(94)01395-c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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